Evaluating the Safety and Immunogenicity of an HIV Vaccine (gp145 C.6980) in Healthy, HIV-Uninfected Adults in the United States

Inclusion Criteria: General and Demographic Criteria * Age of 18 to 50 years * Access to a participating HIV Vaccine Trials Network (HVTN) clinical research site (CRS) and willingness to be followed for the planned duration of the study * Ability and willingness to provide informed consent * Assessment of understanding: volunteer demonstrates understanding of this study and completes a questionnaire prior to first vaccination with verbal demonstration of understanding of all questionnaire items initially answered incorrectly * Agrees not to enroll in another study of an investigational research agent before the last scheduled protocol clinic visit * Good general health as shown by medical history, physical exam, and screening laboratory tests HIV-Related Criteria: * Willingness to receive HIV test results * Willingness to discuss HIV infection risks and amenable to HIV risk reduction counseling. * Assessed by the clinic staff as being at "low risk" for HIV infection and committed to maintaining behavior consistent with low risk of HIV exposure through the last required protocol clinic visit. Low risk guidelines are found on the protocol web page under Study Materials on the HVTN Members' site (https://members.hvtn.org/protocols/hvtn122). Laboratory Inclusion Values Hemogram/Complete Blood Count (CBC) * Hemoglobin greater than or equal to 11.0 g/dL for volunteers who were born female, greater than or equal to 13.0 g/dL for volunteers who were born male * White blood cel…